The maximum efficiency of resistance loaded class A power amplifier is _________________?

Related Mcqs:

1. The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?

   A. 10 W
   B. 15 W
   C. 5 W
   D. 20 W

2. The maximum efficiency of transformer coupled class A power amplifier is _______________?

   A. 30%
   B. 50%
   C. 80%
   D. 45%

3. A 2-transistor class B power amplifier is commonly called ______________ amplifier?

   A. Dual
   B. Push-pull
   C. Symmetrical
   D. Differential

4. What will be the collector efficiency of a power amplifier having zero signal power dissipation of 5 watts and a.c. power output of 2 watts ?

   A. 20%
   B. 80%
   C. 40%
   D. 50%

5. A class A power amplifier uses _________________?

   A. Two transistors
   B. Three transistors
   C. One transistor
   D. None of the above

6. In a single stage transistor amplifier, RC and RL represent collector resistance and load resistance respectively. The transistor sees a d.c. load of _____________________?

   A. RC + RL
   B. RC || RL
   C. RL
   D. RC

7. If RC and RL represent the collector resistance and load resistance respectively in a single stage transistor amplifier, then a.c. load is____________________?

   A. RL + RC
   B. RC || RL
   C. RL – RC
   D. RC

8. The output power of a transistor amplifier is more than the input power because the additional power is supplied by__________________?

   A. Transistor
   B. Biasing circuit
   C. Collector supply VCC
   D. None of the above

9. Low efficiency of a power amplifier results in_________________?

   A. Low forward bias
   B. Less battery consumption
   C. More battery consumption
   D. None of the above

10. Class_____________ power amplifier has the highest collector efficiency ?

    A. C
    B. A
    C. B
    D. AB